/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wtay@chello.be>
 *
 * gstadder.h: Header for GstAsyncMixer element
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __GST_ASYNC_MIXER_H__
#define __GST_ASYNC_MIXER_H__

#include <gst/gst.h>

G_BEGIN_DECLS

#define GST_TYPE_ASYNC_MIXER            (gst_async_mixer_get_type())
#define GST_ASYNC_MIXER(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ASYNC_MIXER,GstAsyncMixer))
#define GST_IS_ADDER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ASYNC_MIXER))
#define GST_ASYNC_MIXER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_ASYNC_MIXER,GstAsyncMixerClass))
#define GST_IS_ADDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_ASYNC_MIXER))
#define GST_ASYNC_MIXER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_ASYNC_MIXER,GstAsyncMixerClass))

typedef struct _GstAsyncMixer             GstAsyncMixer;
typedef struct _GstAsyncMixerClass        GstAsyncMixerClass;
typedef struct _GstAsyncMixerInputChannel GstAsyncMixerInputChannel;

typedef enum {
  GST_ASYNC_MIXER_FORMAT_UNSET,
  GST_ASYNC_MIXER_FORMAT_INT,
  GST_ASYNC_MIXER_FORMAT_FLOAT
} GstAsyncMixerFormat;

typedef void (*GstAsyncMixerFunction) (gpointer out, gpointer in, guint size);

typedef struct {
  GstPad * pad;
  GQueue * queue;
  GMutex *qlock;
} GstAsyncMixerQueue;

/**
 * GstAsyncMixer:
 *
 * The adder object structure.
 */
struct _GstAsyncMixer {
  GstElement      element;

  GstPad         *srcpad;
  //GstCollectPads *collect;
  GSList          *pads;
  /* pad counter, used for creating unique request pads */
  gint            padcount;

  /* the next are valid for both int and float */
  GstAsyncMixerFormat  format;
  gint            rate;
  gint            channels;
  gint            width;
  gint            endianness;

  /* the next are valid only for format == GST_ASYNC_MIXER_FORMAT_INT */
  gint            depth;
  gboolean        is_signed;

  /* number of bytes per sample, actually width/8 * channels */
  gint            bps; 

  /* function to add samples */
  GstAsyncMixerFunction func;

  /* counters to keep track of timestamps */
  gint64          timestamp;
  gint64          offset;
  
  /* sink event handling */
  GstPadEventFunction  collect_event;
  GstSegment      segment;
  gboolean        segment_pending;
  guint64         segment_position;
  gboolean        started;
  GMutex *lock;
  GstCaps *       caps;
};

struct _GstAsyncMixerClass {
  GstElementClass parent_class;
};

GType    gst_async_mixer_get_type (void);

G_END_DECLS


#endif /* __GST_ASYNC_MIXER_H__ */

